set pm3d depth lighting primary 0.6 
set object rect from sc 0,0 to sc 1,1 behind fc "#114400"
set palette defined (0 "#6666ff", 1 "#6666ff")
set samples 128
set isosamples 128
unset border
unset tics
unset colorbox
unset key
set xyplane 0
set view 45,15, 1.5, 
set term pngcairo size 360,360
set out "func000.png"

c = 10
set xrange [-c:c]
set yrange [-c:c]
set zrange [-c*(1-0.5):c*(1+0.5)]

splot 1.5*c*sin(x)*sin(y)/x/y w pm3d
!display "func000.png"